ISurfaceComposerClient.cpp revision 99ed22412db547c59d3da08114d9d5a586442b30 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17// tag as surfaceflinger
18#define LOG_TAG "SurfaceFlinger"
19
20#include <stdio.h>
21#include <stdint.h>
22#include <sys/types.h>
23
24#include <binder/Parcel.h>
25#include <binder/IMemory.h>
26#include <binder/IPCThreadState.h>
27#include <binder/IServiceManager.h>
28
29#include <ui/Point.h>
30#include <ui/Rect.h>
31
32#include <surfaceflinger/ISurface.h>
33#include <surfaceflinger/ISurfaceComposerClient.h>
34#include <private/surfaceflinger/LayerState.h>
35
36// ---------------------------------------------------------------------------
37
38/* ideally AID_GRAPHICS would be in a semi-public header
39 * or there would be a way to map a user/group name to its id
40 */
41#ifndef AID_GRAPHICS
42#define AID_GRAPHICS 1003
43#endif
44
45// ---------------------------------------------------------------------------
46
47namespace android {
48
49enum {
50    CREATE_SURFACE = IBinder::FIRST_CALL_TRANSACTION,
51    DESTROY_SURFACE
52};
53
54class BpSurfaceComposerClient : public BpInterface<ISurfaceComposerClient>
55{
56public:
57    BpSurfaceComposerClient(const sp<IBinder>& impl)
58        : BpInterface<ISurfaceComposerClient>(impl)
59    {
60    }
61
62    virtual sp<ISurface> createSurface( surface_data_t* params,
63                                        const String8& name,
64                                        DisplayID display,
65                                        uint32_t w,
66                                        uint32_t h,
67                                        PixelFormat format,
68                                        uint32_t flags)
69    {
70        Parcel data, reply;
71        data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor());
72        data.writeString8(name);
73        data.writeInt32(display);
74        data.writeInt32(w);
75        data.writeInt32(h);
76        data.writeInt32(format);
77        data.writeInt32(flags);
78        remote()->transact(CREATE_SURFACE, data, &reply);
79        params->readFromParcel(reply);
80        return interface_cast<ISurface>(reply.readStrongBinder());
81    }
82
83    virtual status_t destroySurface(SurfaceID sid)
84    {
85        Parcel data, reply;
86        data.writeInterfaceToken(ISurfaceComposerClient::getInterfaceDescriptor());
87        data.writeInt32(sid);
88        remote()->transact(DESTROY_SURFACE, data, &reply);
89        return reply.readInt32();
90    }
91};
92
93IMPLEMENT_META_INTERFACE(SurfaceComposerClient, "android.ui.ISurfaceComposerClient");
94
95// ----------------------------------------------------------------------
96
97status_t BnSurfaceComposerClient::onTransact(
98    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
99{
100     switch(code) {
101        case CREATE_SURFACE: {
102            CHECK_INTERFACE(ISurfaceComposerClient, data, reply);
103            surface_data_t params;
104            String8 name = data.readString8();
105            DisplayID display = data.readInt32();
106            uint32_t w = data.readInt32();
107            uint32_t h = data.readInt32();
108            PixelFormat format = data.readInt32();
109            uint32_t flags = data.readInt32();
110            sp<ISurface> s = createSurface(&params, name, display, w, h,
111                    format, flags);
112            params.writeToParcel(reply);
113            reply->writeStrongBinder(s->asBinder());
114            return NO_ERROR;
115        } break;
116        case DESTROY_SURFACE: {
117            CHECK_INTERFACE(ISurfaceComposerClient, data, reply);
118            reply->writeInt32( destroySurface( data.readInt32() ) );
119            return NO_ERROR;
120        } break;
121        default:
122            return BBinder::onTransact(code, data, reply, flags);
123    }
124}
125
126// ----------------------------------------------------------------------
127
128status_t ISurfaceComposerClient::surface_data_t::readFromParcel(const Parcel& parcel)
129{
130    token    = parcel.readInt32();
131    identity = parcel.readInt32();
132    return NO_ERROR;
133}
134
135status_t ISurfaceComposerClient::surface_data_t::writeToParcel(Parcel* parcel) const
136{
137    parcel->writeInt32(token);
138    parcel->writeInt32(identity);
139    return NO_ERROR;
140}
141
142}; // namespace android
143